Eclipse could not delete error

Question

I\'m working on a project with Eclipse and by now everything was fine, but last time I\'ve tried building it, it returned the error,

\"The project was

Answer 1

I went to the Java Build Path ->Source (tab) ,changed the path of the Default Output folder to some other folder like customerConfig/bin to customerConfig/bins ,did a build , the error went away and then went back and changed it back to customerConfig/bin